Motor for fluid-pressure door-operating devices.



A. GOTTSCHALKX MOTOR FOR FLUID PRESSURE DOOR OPERATING DEVICES.

APPLICATION FILED AUG.2. 1912.

PatP-nte June 12, 191?.

3 SHEETSSHEET I A. GOTTSCHALK. MOTOR FOR FLUID PRESSURE DOOR OPERATING DEVICES.

APPLICATION FILED AUG.2. I9I2. 1

3 SHEETS-SHEET 2.

Patented June 12, 1917.

APPLICATION FILED AUG. 2, IQIZ.

Patented J 11116 12, 1917.

3 SHEETS-SHEET 3.

' so section and partly WQWKTED STATES PATENT GFFXCE.

ALBERT GGT'ISCHALK, OF NEW YORK, N. Y., ASSIGNOR,TO NATIONAL PNEUIKATIC CDMPAYNY, OF CHICAGO, ILLINOIS, A CORPORATION OF WEST -VIEGINIA.

IEU'IOR FOR FLUID-PRESSURE DOOR-OPERATING DEVICES.

rea ers.

ipplication filed August 2, 1912. Serial No. 712,859.

To aZZ whom may concern:

Be it known that I, ALBERT Go'r'rsoHALK, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Motors for Fluid-Pressure Door-Operating Devices, of which improvement the following is a specification.

This invention relates to fluid pressure motors for operating devices adapted to be shifted from one position to another position, for example, a door operating motor, to

. operate the door from. open to closed position, and vice versa at the will of the operator, and is designed more particularly for operating car doors, such as used on subway, elevated railway, or suburban electric traction cars where the guard or conductor who operates the door usually stands at some distance from the same, as at the end of the car.

In devices of this character, a fluid pressure motor is ordinarily provided for directly actuating the door 111 its opening and closing movements, and one of the objects of my present invention is to provide improved valve means for controlling the operation of said motor from a distance, as from the end of the car. I

Another object is to provide improved means for shifting the valve of the actuating motor whereby fluid pressure may be supplied at will. to operate said motor in one direction or the other, and then automatie .cally out off said supply by the movement of :the. motor. These and other objects will now more fully appear from the following description j of apparatus embodying my improvement. to In the accompanying drawings: Figurel is a side elevation. showing one form of my improvement with certain parts indicated in section; Fig. 2, a side elevation showing a modification; Fig. 8, a view partly in section and partly in elevation of the manually operative controlling valve device; Fig. 4, a

central transverse section of the same; Fig. 5, a face view of the valve seat; Fig. 6, a plan of the valve; Fig. 7, a view partly in in elevation, showing a further modification; Fig. 8, central transverse section of the same: Fig. 9, a face view of the valve seat; and Fig". 10, a plan of the rotary valve of the modification shown in 55.}?1g. 7. Fig. 11 is a broken sectional view Specification of Letters Patent.

of one end of the motor, looking in the rear of the structure shown in Fig. 7.

According to the construction shown, the motor may comprise a cylinder, 8, containing piston 9, connected by a rack bar, 10, having teeth, 11, engaging the pinion or sector gear, 12, on shaft, 13, on which is mounted the arm, 14, adapted to be connected to a door, gate or other member which it l-s'tie sired to shift from one position to another, such as between its open and closed positions, all as described in my Patent No. 1,065,323 dated June 17, 1913.

A rotary valve, 15, (shown in dotted lines in. Fig. 1 and also in Fig. 8), may be pro vided in a casing,,17, and be operated by a stem, .18, for'controlling the supply of fluid under pressure from a supply pipe, 20, to the opposite ends of the motor cylinder for opening and closing-the door or other device.

For the purpose of readily controlling the casing,- 42, and operated by a handle, 43,

which preferably has an open and a closed position upon each side, as indicated on dotted lines, Fig. 3, corresponding with the movement of the actuating motor in oppositedirections. The valve Scfif 1 "v be provided with a port, 44, communicatnig with a source of fluidcpressure, an exhaust port, 45, and ports or conduits, the motor. The valves may have through ports 48 and 49 adapted to cooperate with ports' 46 and 47, respectively, a cavity,50, and a port, 51, communicating with port, 44, for admitting fluid into the valve chamber.

For the purpose of automatically returning the valve from an open to a closed or lap position when the hand is-removed from the. handle, I have shown one form of such mechanism comprising a sleeve, 52, mounted on the valve casing, and havingacut-out portion or slot forming shoulders, 53, and 54:, upon opposite sides for engaging the ham dle, 43, the sleeve also having teeth, 55, engaging. rack bar, 56, located between the pis-, ton heads, 57 and 58. Th'cchamhers at the Patented June 12, 1917.

46 and 47 leading to outer ends of these pistons communicate with the passages or conduits, a6 and 4.7, by branch passages, 16 and 17, respectively, so that when fluid is admitted through either passage, it also acts upon the outer face of one of these pistons.

When it is desired to operate the door, the valve is turned from one of its closed positions, such as that shown in the drawing, to,

its correspondingly open position in which the sleeve is rotated to move out the piston, 58, and register the ports,- 49 and 17, thereby admitting fluid under pressure through passage, 4:7, to the motor, and through 47 to the piston 58, the passage, -16, being in communication with the exhaust-through cavity, 50, and port, 45. The pressure acts on the piston 58 and shifts the rack bar, sleeve, and valve back to its closed position when the operators hand is removed from the handle. In this way the supply of fluid is automatically cut off during the periods that the motor is not ()l'JGPilblllg, thereby preventing leakage and a waste of the fluid pressure.

lhe operation in the opposite direction is substantially the same, except that the valve handle is turned to the other side, opening ports, 48 and 46, and admitting fluid to the pistol 57. The advantage of having the two sets of ports upon opposite sides of a middle position is to positively indicate the direction that the motor is to be operated, and the position of the door, one side being used for opening the door, and the other side for closing the same. Springs may also be used bearing upon the pistons, 58 and 57, to normally hold the same at their inner positions.

The fluid admitted through conduits 47 and 16 may be supplied directly into the motor cylinder, 8, as indicated in Fig. 2, but I preferably employ a separate valve 15, at the motor, and a valve shifting motor therefor, as shown in Fig. 1, According to this construction, the valveshifting cylinder, 60, contains pistons, 61, and connecting rack bar, 62, engaging the sector gear, 63, mounted on the stem, 18, o"? the valve for controlling the supply of fluid to and from either end of the main cylinder, 8. Whenthe manually operative vali'e is turned to admit fluid under pressure through either of the conduits, 47 or 46 to the cylinder, 60, the piston 61, shifts the valve to register the ports, shown in dotted lines, to admit fluid to the corresponding end of main cylinder, 8, to open or close the door as desired. As soon as the piston, 61, has shifted, the pressure operates on the piston, 57 or 58, of the hand operated valve and shifts the same to the corresponding closed position, as before described. In this closed position, it will be noticed that the cavity, 50, in valve,40, connects both supply ports, 46 and 47 to the exhaust as shown in Figs. 5

and 6 so that the pressure will then be relieved from piston, 61, and if some centering means, such as springs, 65, are employed, the valve 15, operating on stem, 18, may be automatically shifted to its normal intermediate or closed position, thereby cutting ofi all supply of fluid to the motor.

In order to control the operation of the motor from either end of the car, a man-- ually operative valve device may be pro- 7 vided at each end of the car and the conduits or pipes, 46 and 47, extend from both ends to the motor, double check valves, 70, being provided at the connection of the branch pipes leading to the motor as will 8 be readily understood.

In Figs. 7 to 10, I have illustrated an improved construction in which the valve shifting cylinder, 60, is combined with the automatic valve closing device of my former application above referred to. According to this construction, the controlling valve, 15, of the motor is provided with cavities, 23, 28, and 28 and is mounted on a seat, 16. having ports, 24 and 25, leading 9 to opposite ends of the motor cylinder, 8, supply port, 21. and exhaust ports, 29 and 29". On the valve casing is mounted a gear wheel, 35, which is connected with the stem of the-valve to turn the same, and has teeth 9 on one side engaging the rack bar, 34, operated by pistons, 33, of valve closing cylinder, 30, and on the other side engaging with the rack bar, 62, of the valve shifting cylinder, 60.

When the manually operative valve at one end of the car is turned to supply fluid to'the valve shifting cylinder, 60, as above described, the valve, 15, is actuated by piston, 61, to open one of the supply ports, 24 or 25 to admit fluid to the motor cylinder, 8, to open or close the door. The rack, 34, and piston, 33, are at the same time shifted from the normal intermediate position to the corresponding end of cylinder, 30. Then as the main piston, 9, reaches the end of its stroke, in opening or closing the door, it uncovers the corresponding port, 31 or 32, admitting fluid from the motor cylinder to the valve closing cylinder and acting on piston, 33, automatically moves the pinion or gear, 35, to return the valves to its normal closed position, and the piston, 61 to its normal intermediate position as. shown in Fig. 7. When the parts are in their normal neutralposition, it will be seen that the pistons 33 uncover the exhaust ports 33" thereby allowing the pressure within the cylinder 30 to pass out to the atmosphere.

Itvvill now be apparent that by means of my improvement, the actuating motor may be readily controlled from a distance, as from either end'of the car, and that after each operation the valves are automatically returned to closed position thereby cutting 1 011'. all supply of fluid pressure withoutfurther attention on the part of the operator.

Having now described my invention, What I claim as new and desire to secure by Letters Patent is:

1. The combination with a motor and fluid pressure supply connections thereto, of a manually operative valve located at a distance from said motor for controlling said connections, said valve having two open positions, and means operated by the fluid pressure in said connections for automatically closing said valve from either of its open positions. ,5

2. The combination with a motor and fluid pressure supply connections thereto, of a valve means for controlling the supply of fluid from said connections to said motor, a fluid pressure mechanism for shifting said valve to open the supply, and a manually operative valve located at a distance from the motor for controlling the flow of fluid to said valve shifting means, and means operated by the fluid pressure in said connections for automatically shifting 'the latter valve from open to closed position.

3. The combination with a motor and fluid prcssuresupp'ly connections thereto, a valve for controlling the supply of fluid from said connections to said motor, and a piston device for shifting said valve to open position, of means operating upon movement of the actuating motor to the end of its stroke, to shift said valve to closed position, and a manually operative valve for controlling the pressure on said piston device.

fluid from said connections to said motor,

of a pinion for operatingthe valve, a piston a motor and device with a rack engaging one side of the pinion to open the valve, and another piston device with a rack engaging another part of the pinion and operated by "the fluid pressure exhausted from said'motor to close the valve.

' (i. The combination with a motor and fluid pressure supply connections thereto, and a. valve for controlling the supply of 'fluid from said connections to said motor,

of a pinion for operating the valve, a piston device with a rack engaging one side of the pinion to open the valve, a manually operative-valve for controlling the pressure on said piston device, and another piston and rack device operated by fluid pressure exhausted from the motor, and engaging the other side of said pinion to close the valve.

ALBERT GOTTSCHALK.

Witnesses:

A. S. FOWLER, E. A. WRIGHT. 

